2 sentences

1. 他们在草地上快活地唱着歌。

   tā​men zài cǎo​dì shàng kuài​huo de chàng zhe gē.

   They were singing happily on the grass.

   Source: Dong Chinese Dictionary

2. 他退休后每天钓鱼下棋，过得像神仙一样快活。

   tā tuì​xiū hòu měi tiān diào​yú xià​qí, guò de xiàng shén​xiān yī​yàng kuài​huo.

   After retiring, he spent his days fishing and playing chess, living as happily as an immortal.

   Source: Dong Chinese Dictionary